SN74CBT3306CDR

Overview

The SN74CBT3306CDR is a dual FET bus switch from the Texas Instruments CBT logic series, housed in an 8-pin SOIC package. It operates on a single power supply ranging from 4.5 V to 5.5 V and supports data I/O voltages from 0 V to 5.5 V. The device features two independent 1:1 switches with separate output enable inputs. Key electrical parameters include a maximum on-resistance of 14 Ω, a typical on-resistance of 3 Ω, and a maximum propagation delay of 0.35 ns at 4 V with a 50 pF load. It provides -2 V undershoot protection and supports partial power-down mode.

Feature Summary

• Features active undershoot protection circuitry that detects negative voltage excursions and maintains correct off-state integrity during -2 V events.
• Supports bidirectional data flow with near-zero propagation delay for high-speed signal transmission.
• Enables partial power-down operation via the Ioff function to prevent reverse current flow when the device is de-energized.

Applications

• High-speed digital and analog signal switching
• Portable equipment requiring low power consumption
• Computing and peripheral systems

Procurement Notes

Verify the specific suffix 'CDR' against the manufacturer's official documentation to confirm the tape-and-reel packaging configuration and ensure compliance with RoHS standards. Confirm the operating temperature range matches the application requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring low on-resistance and fast switching speeds within a 5 V logic environment. Ensure the control inputs are compatible with TTL or 5 V CMOS levels. Verify that the 8-SOIC package dimensions fit the available PCB footprint constraints.

Part Context

This part belongs to the Texas Instruments SN74CBT family of bus switches. These devices are designed as replacements for legacy 74SCT and 74ACT logic families, offering improved performance characteristics such as lower power consumption and faster switching speeds while maintaining pin compatibility.

Replacement Considerations

The SN74CBT3306DRE4 is a verified equivalent variant featuring lead-free construction. Other variants within the same functional family may be considered if package type or environmental compliance differs.